Vinted Asked for My National Insurance Number. Am I in Trouble with HMRC?
Vinted asking for your National Insurance number is not an investigation. Here is what it means, what happens next and what to do if you are an online trader.
SELF ASSESSMENT TAX RETURNS
No. You are not in trouble. Vinted asking for your National Insurance number is not an investigation, a penalty notice or a sign that HMRC is looking at your account. It is a legal compliance step that Vinted, eBay, Etsy, Depop, Amazon and other online platforms are required to carry out under UK digital platform reporting rules. Providing your NI number is the right thing to do. What happens after you provide it depends entirely on your own selling activity, and for many sellers the answer is: nothing further happens at all.
Jade received the notification in early 2025. She was mid-listing, photographing a bundle of jumpers she had picked up at a charity shop the weekend before, when the Vinted app asked for her National Insurance number before she could continue. She closed the app. She googled it. She spent twenty minutes reading articles that made her more confused than when she started. She was convinced HMRC was about to send her a letter.
Three months later she had filed her Self Assessment return, paid her tax bill and understood exactly why the notification had appeared and what it meant. The notification was not the problem. It was information. This article gives you the same clarity she eventually found, without the twenty minutes of confusion.
Why Vinted, eBay, Etsy, Depop and Amazon Are Asking for This
The request for your National Insurance number is not coming from HMRC. It is coming from the platform itself, and it is fulfilling a legal obligation introduced in January 2024.
Under the UK's digital platform reporting rules, all major online selling platforms are required to collect certain information about their sellers and pass it to HMRC if the seller meets specific thresholds. The platforms affected include Vinted, eBay, Etsy, Depop, Amazon, Airbnb, Fiverr, Upwork and any other digital marketplace where people earn income. This is not a Vinted-specific policy. It is a UK-wide requirement covering the entire online selling ecosystem.
The thresholds that trigger the NI number request and the subsequent report to HMRC are:
More than 30 transactions in a calendar year, or approximately £1,740 in gross receipts in a calendar year.
Either condition triggers the reporting obligation. A seller who makes 35 sales worth a total of £400 has crossed the transaction threshold and will be asked for their NI number, even though their income is well below the £1,700 monetary figure. A seller who makes 10 sales worth a total of £2,000 has crossed the monetary threshold and will also be asked, even with fewer transactions.
Note that these thresholds apply per calendar year, January to December, not per tax year. This is an important distinction. The reporting period for these purposes does not align with the April to April Self Assessment tax year.
One error that appears in some online articles is worth correcting directly. The NI number request threshold is not £1,000. The £1,000 figure is the trading allowance, which is a separate concept relating to your tax liability. The reporting threshold is approximately £1,700 in gross receipts or 30 transactions. These are different numbers serving different purposes.
What Happens After You Provide Your NI Number
Once you provide your NI number, Vinted or the relevant platform includes your sales data in its annual report to HMRC. That report shows your name, National Insurance number, address and total gross sales for the calendar year. HMRC receives this data from every reporting platform simultaneously and can cross-reference it against Self Assessment records.
For the 2024 calendar year, platforms submitted their reports to HMRC by 31 January 2025. For the 2025 calendar year, reports were submitted by 31 January 2026. HMRC therefore holds data covering all sellers who met the thresholds in those periods.
What happens next depends entirely on your situation.
If you are a casual seller disposing of personal possessions, HMRC receives the data and nothing further happens. There is no tax obligation from selling your own belongings, regardless of how much you receive. Having the data does not create a tax liability where none exists.
If you are a trader with gross income above £1,000 who has registered and filed correctly, the data HMRC receives matches your declared income. There is no issue.
If you are a trader with gross income above £1,000 who has not registered or filed, HMRC's data shows income that has not been declared. This is where the notification matters. It is not a sign that HMRC is about to contact you. It is a sign that the information exists and that sorting things out now, voluntarily, is considerably better than waiting to be contacted.
What "Providing Your NI Number" Does Not Mean
It does not mean HMRC is investigating you. Investigations are targeted and deliberate. Receiving an NI number request is an automated platform compliance process that happens to every seller who crosses the threshold.
It does not mean you owe tax. Tax liability depends on the nature of your activity and your income level, not on whether you have provided an NI number.
It does not mean you have done something wrong. Crossing the DAC7 reporting threshold is not itself a tax event. Millions of sellers cross it every year who owe nothing.
What it does mean is that if you have a tax obligation, HMRC now has data that confirms your income. The practical consequence depends on whether that obligation exists and whether it has been met.
What to Do If You Have Not Yet Provided Your NI Number
Provide it. Withholding your NI number does not prevent Vinted from reporting you to HMRC. If you have already crossed the threshold, Vinted still reports the sales data. What withholding does is prevent you from withdrawing your funds from the platform and continuing to sell. There is no benefit to withholding it and a practical cost.
The process is straightforward. Vinted displays the prompt in the app. Enter your NI number when asked. The format is two letters, six numbers and one letter, for example AB123456C. It appears on your payslip, P60, P45 or any HMRC correspondence.
What to Do If You Are a Trader Who Has Not Registered
If you have been buying items to resell on Vinted, eBay, Etsy, Depop or any other platform, and your gross trading income from all platforms combined has exceeded £1,000 in the tax year, you need to register for Self Assessment and file a return.
The registration deadline for the 2025/26 tax year was 5 October 2026. If that date has passed, register now regardless. Voluntary disclosure, coming forward before HMRC contacts you, is consistently treated more leniently than being contacted first.
The steps are: register at gov.uk, wait for your Unique Taxpayer Reference to arrive by post, reconstruct your income and expenses from platform transaction reports and bank statements, calculate the tax owed and file before 31 January 2027.
The income figure to declare is the gross amount your buyers paid, not the net amount that arrived in your bank account after platform fees. HMRC holds the gross figure from the platform reports. Your return needs to match it. Platform fees are then claimed as a separate allowable expense. Note that Vinted is different from other platforms , buyers pay the buyer protection fee separately, so Vinted sellers receive the full listed price with no seller-side deduction and there are no Vinted seller fees to claim. For a full breakdown of what online sellers can claim, including expenses most commonly missed, our guide to expenses sole traders commonly miss covers the full list.
If you have been selling on multiple platforms simultaneously, the income from each one is combined for the purpose of both the trading allowance threshold and your tax calculation. Selling £600 on Vinted and £600 on eBay in the same tax year gives a combined total of £1,200, which is above the £1,000 trading allowance threshold even though each platform is individually below it.
For anyone uncertain whether their activity counts as trading at all, our guide to whether you owe tax on your Vinted sales covers the five questions that determine the answer.
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